<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title@yield('title','标题')</title>
    <style>
        .header{
            width: 1000px;
            height: 150px;
            margin: 0 auto;
            background: #9acfea;
            border:1px solid #ddd;
        }
        .main{
            width: 1000px;
            height: 300px;
            margin: 0 auto;
            margin-top: 15px;
            clear: both;
        }
        .main .sidebar{
            float: left;
            width: 20%;
            height:inherit;
            background: #f5f5f5;
            border:1px solid #ddd;
        }
        .main .content{
            float: right;
            width: 75%;
            height:inherit;
            background: #f5f5f5;
            border:1px solid #ddd;
        }
        .footer{
            width: 1000px;
            height: 150px;
            margin: 0 auto;
            margin-top: 15px;
            background: #f5f5f5;
            border: 1px solid #ddd;
        }
    </style>
</head>
<body>
<div class="header">
  @section('header')
  头部
  @show
</div>
<div class="main">
    <div class="sidebar">@section('sidebar')侧边栏@show</div>
    <div class="content">@yield('content','主要内容区')</div>
</div>
<div class="footer">@section('footer')底部@show</div>

</body>
</html>